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J. MIGHAUD. I ROTARY PRINTING MACHINE.

N0. 528,233. Patented Oct. 30, 18-94.

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. UNITED STATES PATENT OFFICE.

.IIILES MICHAUI), OF PARIS, FRANCE.

ROTARY PRI'NT'ING-MACHIN E.

SPECIFICATION forming part of Letters Patent No. 528,233, dated October30, 1894.

pp s filed October 22, 1892. Serial No. 449,647. (No model.) Patented inFrance August 6, 1890,1l'o. 207,459, and in England July 20,1891, No.12,290.

To all whom it may concern:

Belt known that I, J ULES MIOHAUD, a citizen of the Republic of France,residing at 96 Rue dAss-as, Paris, France, have invented certain new anduseful Improvements in R- tary Printing-Machines, (for which I haveobtained certificates of addition, dated March 7, 1891, April 25, 1891,June 4, 1891, July 1, 1891, and August 1, 1891, to French Patent No.207,459, dated August 6, 1890, and a patent in Great Britain, N 0.12,290, dated July 20, 1891,) of which the following is 'aspecification.

The present invention relates to various improvements applicable torotary printing machines generally.

I shall proceed to describe such improvements as are applied to amachine for color printing. They may be applied irrespective of thenumber of printing cylinders employed.

Figure 1, is a vertical section of the machine. Fig. 2, is a verticalsection of a modification of the means employed for delivering a packetor pile of sheets. Fig. 3 is a longitudinal section of the means fordriving the feed roller. Fig. 4, is an end view' of a blanket cylindershowing the arrangement of a continuous circle for the balls whichgovern the feed of the paper to bear upon.

Referring to Fig. 1, 1, 2, 3, 4 and 5, are the blanket or impressioncylinders. 6, 7, 8, 9, 10, 11, 12 and 13 are the printing cylinders.Each of the latter is provided withan inking apparatus. 14, 15 and 16are cutting and folding cylinders.

The blanket cylinder 1 prints one side of the sheet in two colors bycontact with the printing cylinders 6 and 7. The other cylinders servefor printing the other side ofthe sheet.

I have shown four blanket cylinders 2, 3, 4 and 5 for the second side ofthe sheet, but there may be more, and with each I may employ one or moreprinting cylinders, but no matter what the number of these cylinders, Iarrange them so that by means of the space left in the middle of themeach cylinder may be reached and the blanket readily removed, and themake-ready effected with ease. The printing cylinders being outside theline formed by the paper passing round the blanket cylinders, theseoperations will in no way be interfered with. The result of thisarrangement of cylinders and the manner in which .the paper passes, isthat the removal of the blankets and the make-ready may be elfected onthe cylinders for printing the second side of the sheet and for colorprinting, without having to cut the paper. I

The reel of paper to be printed is shown at 17.

18 is a reel of paper for the ofi-set, the object of which is, by itsinterposition between the blankets of cylinders 2, 3, 4, 5 and theprinted sheet,to prevent the soiling of the blankets on such cylinders.The web of 011- set paper, after having passed through the machine isrewound on spindle 19 which first rests on the two rollers 20, 21, andwhich rises between two guides as the diameter of the reel 19 increases.The rollers 20, 21, revolve and elfect the winding of the paper. Roller20 carries a pulley driven by a belt from a pulley mounted on the end ofcylinder 15. The rollers 20 and 21 are connected by toothed wheels. Oneof the guides between which spindle 19 rises is movable. This is marked22, and when the reel has attained its full size and it is necessary toremove same, such part is raised to the position 22, for which purposeit is only necessary to remove the bolt 23. g

It .will be clearly seen in Fig. 1, that the offset paper and also theweb to be printed may remain engaged in the machine and do not requireto be severed in order to enable the make-ready to be eifected on thecylinders 2, 3, 4, 5. In the case where the employment of an off-set webis not indispensable, I may apply cleaning rollers 60. to each of theblanket cylinders, such rollers, either coated with paraf fine or not,serving to clean the blankets.

The printed sheets are cut by the sawor knife 39 and folded by theblades 40, 41, 42, 43, of the cylinders 14, 15 and 16, and are thenreceived by the fliers 24. 25 is an endless Web of linen, leather belt,or metallic sheet passing over two rollers 26 and 27. Pins or stops 28,28', 28", &c., are fixed to this strap or web, and are the same distanceapart as the size of the folded sheet. The parts 29 which correspondwith recesses made in the rollers 26, 27, insure the strap being carriedforward, but this may be effected by any other suitable means. By meansof the mechanism consisting of the cam 30, lever 31, connecting rod 32,the pawl lever 33, pawl 34 and the ratchet 35, for a given number ofrevolutions of the printing cylinders Iobtain a forward travel of theweb equal to the length of the sheet, such travel occurring between twomovements of the fliers, whereby the packet or pile of sheets previouslyreceived advances from 36 to 37, where it may be readily removed, andwhich pile consists of a given number of sheets.

Fig. 2, shows another arrangement for obtaining the same result. 38 is aprism each side of which is equal to the size of the sheet. On one ofits faces it receives a given number of sheets, and when such number isattained it is turned by means of the same mechanism as in the precedingcase, to the position to present a new face to the fliers.

In all rotary machines in general, and particularly in that class towhich the present invention is specially applicable, it is of very greatimportance to insure a regular travel of the paper no matter whatresistance is offered by the brakes to the unwinding of the reels. Inmachines as at present constructed it may happen that at a given momentthe blanket cylinders all cease to bear on the printing cylinders, andthat then a slipping of the paper may occur which may produce a failurein either the register of the impressions on the opposite sides of thesheet, or in the register of the different colors. In this case theballs such as 67, 68, Fig. 1, bearing on cylinder 1 or on the roller 69in the blank or white parts may not prove sufficient to prevent thisslipping.

I insure the regular feed of the paper from the reel not only by rollersand balls, and by the pressure of the printing cylinders on the blanketcylinders, which pressure is necessarily intermittent on account of thespaces between the printing plates, but by the pressure before anyimpression of a roller 44. clothed with india-rubber or other suitablematerial, against a cylinder 55 traveling at exactly the same speed asthe circumference of the blanket cylinders. (See Fig. l.) The cylinder55 is driven so as to always maintain the paper at the proper tensioneven if there is a slight difference between its speed and that of theprinting cylinders. In the first place the surface speed of the roller55 is calculated so as to be exactly the same as that of the printingcylinders when carrying the normal clothing or covering, that is to saythe blankets and a make-ready or backing of a predetermined thickness.If then the circumferential speed of roller 55 is greater than that ofthe blanket cylinders, it is because the latter are not sufficientlyclothed, and it is only necessary to apply to such cylinders, beneaththe blanket, a sheet of paper, so as to increase their size andconsequently the surface speed, and thus to attain approximately(preferably exceeding same than otherwise) the circumferential speed ofthe feed roller 55. The paper will then always remain stretched betweenrollers 55 and the printing cylinders,

and it is then only necessary to guard against the breaking of the paperwhich mightoccur from excess of tension if the speed of the roller 55 isless than-that of the printin g cylinders. For this purpose I actuateroller 55 so that it insures the feed of the paper at the speed it iscalculated it should have, but further if the speed of the printingcylinders is higher than that calculated (which mightoccur at thebeginning of an impression when the blankets are not then compressed) itwill be the printing cylinders which draw the roller 55 around at theirown speed by means of the sheet of paper itself.

The method of driving roller 55 is shown in Fig. 1, and also in sectionin Fig. 3.

b is the driving wheel actuated by the machine and turning freely on theaxle of the roller. a is a ratchet wheel keyed to the axle of suchroller.

d, d, are pawls fixed to the wheel b, which wheel in revolving actuatesthe roller by the intermediary of the pawls d.

On the speed of the paper exceeding that imparted to the roller by thewheel I), the roller turns under the action of the paper. There areseveral pawls d, and they are of difierent lengths so that when one ofthem leaves one tooth of the ratchet wheel, another one is in contactwith another tooth. Aroller 57 supported by a spring also serves toprevent the rupture of the paper, by rising or falling according to theincrease or decrease of the tension of the paper.

With regard to the carrying forward of the paper by balls 67 of metal,india-rubber or other material, which bear on the blanket cylinder, inorder to maintain the tension of the paper between two succeedingblanket cylinders, I employ the arrangement shown in Fig. 4, to overcomethe difficulties resulting from the passage of the gaps or openings ofthe cylinder beneath such balls.

In the case where there is a blank or white corresponding to the middleof the printed sheet, I may, as shown in Fig. 4., place in the middle ofthe cylinderacircle 7 O of which the diameter is equal to that of thecylinder when clothed. This circle divides the gap, in which the ends ofthe blanket are secured, into two parts 71, 72, and it is upon suchcircle, which is continuous, that the balls 67 serving to carry thepaper forward bear. Separate rods for stretching and securing theblanket will then be provided for the right hand and the left hand ofthe machine. This arrangement will have the further advantage offacilitating the make-ready on the cylinder, as the blankets will be intwo parts in the direction of the length of the cylinder. If there werethree or more printing plates in the width of the machine, I shouldemploy as many gaps in the blanket cylinders as there are printingplates and separate same by circles.

The machine above described and shown in Fig. 1, is constructed so as toprint one side of all the pages in six colors.

What I claim as my invention, to secure by Letters Patent, is:

1. The combination of a rotary printing mechanism, a feed roller forfeeding the web )1? paper to said mechanism, and provided wit-h anaxle,a ratchet wheel keyed to said txl'ie, a driving wheel for said feedroller actiatted by the machine and turning on the axle )f the roller,and a pawl on said driving wheel tdlAPtGd. to engage said ratchet wheel,sub- ;tantially as described.

2: The combination of a rotary printing necihanism, a feed roller forfeeding the web )1? paper to said mechanism, a friction roller formingcontact with said feed roller, and neans for rotating said feed roll ata given ipeied and permitting it to rotate at a higher speed under thedraft of the paper, substanzially as described.

3. The combination of and desire a rotary printing ing said feed rollmechanism, of a polyangnlar drum, the periphery of which has a series offlat peripheral receiving faces for the sheets delivered, triangularpartitions extending outwardly from the angles of the drum, and meansfor intermittently rotating said drum, substantially as described.

. 4. The combination of a rotary printing mechanism, a feed roller forfeeding the web of paper to said mechanism, means for rotatat a givenspeed and permitting it to rotate at a higher speed under the draft ofthe paper, and a spring roller for preventing the breaking of the paper,substantially as described.

5. The combination of a rotary printing cylinder, and a rotary blanketcylinder provided with one or more gaps in its periphery, a continuousrib surrounding said cylinder at a given point, and blankets onoppositesides of said rib, and paper holders bearing on said rib,substantially as described.

JULES MICHAUD.

Witnesses:

Row. M. HOOPER, DAVID T. S. FULLER.

